Do that? Do me?

How could you that. right behind my back
After everything I do good, This what you give back
Though it's not that, It just kept being mysterious
That you did something bad, from a someone in the past
Destroy all we had, though I did my best
And now I realize, my best wasn't good enough
Just an inch in front of my eyes, I see those times were rough
But that's life, you lose one and you gain the other
It's just my choice, those time that mattered
but it's painful now to see, a diamond turned into dust
Though you're not with me, I was hoping the gold won't rust
No it didn't, but it turned to stone
Now you happy? 'coz you're not alone
I'm know I've done something wrong before
Hope it don't be the reason why you've no love no more
There was somethings, I know I shouldn't have said
but it's easy for my lips to be read
No! I shouldn't but told you instead
The truth might be the reason why you want me dead
I've learnt something and it made me strong
But why? I kept mourning for so long